Fuel-oil-delivery system for motor-vehicles.



A. B. WALDEN. FUEL 0 1L DELIVERY SYSTEM FOR MOTOR VEHIGLES'.

APPLICATION FILED JUNE 11, I914.

PaQnted Sept. 22, 1914.

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En resins 'FATEWF WALDEN, (3F DETROIT, MICHEGAN, ASSIGNKDB. TO CEALIEKERh MOTOR Call PANY, 01F DEZEQIT, MIGHIGAN, A GQRPOMCLXQN OF MICHIGAN.

FUEL-DIL-DELIVERY SYSTEM FOR MOTOR-VEHICLES.

Specification of Letters lctent. Patented Smut; lllllll- Acnucuticn filed time 11, 19th. herisl no. access.

.reference being had therein to the accomis lifted by the liquid in the tank ponying' drawings.

The invention relates to liquid fuel delivery systems for motor vehicles of that type in Which'the main reservoir is located below the level of the carbureter and the liquid is elevated by pneumatic pressure.

It is the object of the invention to obtain a, construction which insures the full delivery of the liquid as required, but which avoids danger of feeding when the engine is not in operation. To this end the invention comprises the construction as hereinafter set forth.

In the drawingsz-Figure 1 is a diagrammatic representation of the system; and Fig. 2 is a, vertical'section through the ele vated tank and the control mechanism.

A is the main fuel supply tank, which is conveniently located at a. point below the level of the carbureter.

B is a hand air pump, which is connected by a conduit C to the upper portion of the tank A.

D is a mechanically-operated air pump driven from the engine (not shown) when the latter is in operation, and which iscon nected by a brunch conduit E with the conduit C.

' F is a small tank arranged above the level of the cerhureter Gr and connected by a conduit H with the bottom of the tank A.

l is a conduit extending from the tank F to the cnrbureter, andJ is a float within the tank F, Which is connected with a lever mechanism K for operating a relief valve L in the branch C of the conduit 'C. The arrangement is such that when the float J F itwill open the valve L, and u on the falling of .said float said valve wil -he permitted to close.

With the construction as described in operation, to start the liquid feed the hand pump B is operated to place sufiicient air pressure in the upper portion of the tank A to force the liquid therefrom upward through the conduit H and to fill the smell tank from which liquid is supplied to the carburetor. VlThe-neverthe engine is in operation the mechanically-driven pump U will continue to supply compressed air, which is distributed through the conduit E to the conduit (.1 and to the tank A. The air thus supplied is in excess of that required for the feeding of the oil at the normal rate of consumption, and therefore the air pressure in the system will rise to an abnormally high Eluch a result (point. is, however, prevente by the operation of the float J, which, rising, will operate the lever K and open the relief valve L which is provided with relief ports L. This Will vent the cir'conduit (Irwin provide an escape for the excess pressure. Iii-normal operation the valve L will be held partielly open so as to reduce the air pressure in the systemto just that point which is desirable for the feeding of the oil; Any excess of pressure is prevented by the wider opening of the valve, while any drop in pressure is prevented by the closing of the valve, so that in ellect this valve forms a pressure regulator for maintaining a constunt pressure of air in the system.

It is obvious that when the engine is not running the air pressure will be exhausted so that the oil cannot be elevated from the tank A to the tank F. Thus if there is any leak through the carburetor the only waste will he the relatively smell volume of the tank F and not the larger volume of the tank A.

What I claim as my invention is 1. The combination with a, main tank, of an auxiliary tank at a higher level, a delivery conduit from'said main tank to said auxiliary tank, means for supplying air under pressure to said main tank to elevate the oil therefrom to the auxiliary tank, and means controlled by the level of the oil in the auxiliary tank for" regulating the air pressure.

2. The combination with a main tank, of an auxiliary tank at a higher level, a conduit. for delivering oil from said main tank to said auxiliary tank, means for pumping air to develop a pressure on the oil in said main tank for elevating the some to the auxiliary tank and means controlled by the level of the oil in said auxiliary tank for venting the eirpressurc,

lid

ltd

oi The combination vvith a main tank, of

,an aiixiliary tank at a higher level, a con- 'duit oonnecting said tanks, means for umping air and delivering the same to sai main tank-above the oil therem, a normally closed. went for the air. pressure, and means 0 er i ated by the rise'of the level of the 0' in 'said"auxiliary tank for opening said vent.

4. The combination with a main tank, of

an auxiliary tank at a higher level, a con-- 'duit connecting said tanks, an air pump,

, a conduit for delivering air from said pum to said main tank above the oil therein, sai

conduit also extending in proximity to saidanxiliary tank, and a vent for said conduit opened by the rise of ail in said auxiliary tank above a predetermined level and closed by the fallinfi of the oil below said level.

5. The com ination with a main tank,-of an auxiliary tank at a higher level, a condnit leading from the bottom of said main tank to the top of said auxiliary tank, a mechanically-driven air pump, a conduit connecting said pump to said main tank above the oil therein, said. conduit also exa vent valve communicating with iaid' conduit. and adi a'eent td'hbidfafliiliar? tank, and a float in said emery-tank for 0 mg said vent valve upon the rise ot't e oil above a predeterminedievelfi 6. The combination with a, main tank, of. an auxiliary tank at a higher level, anonduit. connecting said tanks an air conduit connected to said mainttank and extending in proximity to said auxiliary tank, abandoperated pump -for maintaining the air pressure, a valve for venting the air pressure in said conduit adjacenttq said auxiliary tank, and a float insaid auxiliary tanklfor operating said vent valve,

.In-tegtixnony whereof I afiix my signature in presence of twoigaitnesses. H I

ALFRED EJWALDEN,

Witnesses:

Janna P. Baaaz,

HENRI E. Bowaq'tarr.

pump for pinging an initial air --pressure 1n saidflcondult, a power-driven 

